Antenna



FIG. 1 is a front-left-top perspective view of an antenna, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof, the right side view being a mirror image;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a front-right-top perspective view of the antenna in an extended position. 

The ornamental design for an antenna, as shown and described. 